Typhoon Doksuri, a former super typhoon, moved north of China after hitting southern Fujian province last week after ravaging the Philippines.
Heavy rains started lashing the capital and surrounding areas on Saturday.
The amount recorded in just 40 hours approached the average rainfall for the entire month of July.
State media warned last week that 130 million people would be affected by extremely heavy rain across northern China.
Suburban Beijing and surrounding areas have been badly hit by the rain, with state media reporting that 974,400 people have been evacuated in the capital and neighboring Hebei province.
However, authorities in the capital lifted the red alert for flooding on Wednesday morning “as water flows in major rivers dropped below the warning mark”, Xinhua reported.